Once Daisy was sedated and the procedure was underway, Squire said the dentist appeared saying, in addition to the filling she would put in four crowns.

Although skeptical, Squires said she let the dentist go through with it because ‘she trusted him’.

Daisy went into cardiac arrest while under anesthesia. She was rushed to hospital where she later died.

The autopsy report said the cause of death was likely due complications relating to the anesthesia.

However, the report also asked why the work was being done in the first place, as there wasn’t anything wrong with Daisy’s teeth.

‘One can only speculate as to why any treatment was performed considering no indication of dental disease or pathology,’ it said.

The family's attorney Sean Breen told Inside Edition: ‘Why in the world, in the middle of a procedure does a dentist come out and ask a mother: ‘Hey, I’m going put 4 crown on baby teeth a 14 month baby that we know are going fall out anyway.’ People I talked to say [it's] completely unnecessary.’

Attorney for the treating dentist at Austin Children’s Dentistry said there was no sign on dental disease because the dentist had already completed the work.

He added: 'There is no evidence that either the mother, the anesthesiologist, or the dentist did anything to cause the event. The best interest of the child was everyone's only goal. Our hearts continue to go out to the family.'